A cube in a dream represents the solid, physical world. If a cube appears in your dream, it can mean that you need to pay more attention to everyday, mundane matters. You may have been neglecting them too much in order to focus on more abstract or spiritual issues. Remember that earthly matters are important and it is not fair to burden others with your responsibilities.
If the cube appears menacing or dangerous, you could feel that you are being overwhelmed with mundane responsibilities. You need to make more time for yourself so you can develop spiritually and emotionally.
A heavy or solid cube in a dream can represent steadfastness or stubbornness.
A hollow cube in a dream can symbolize feminine energy, while an object inside a hollow cube can represent the integration of masculine and feminine qualities.